Toyota Sienna Service Manual: Sensor signal check by test mode (signal check) (when using intelligent tester)

(a) When having replaced the skid control ECU and/or yaw rate and deceleration sensor, perform zero point calibration of the yaw rate and deceleration sensor.

HINT:

• If the ignition switch is turned from the ON position to the ACC or off during test mode (signal check), DTCs of the signal check function will be erased.
• During test mode (signal check), the skid control ECU records all DTCs of the signal check function. By performing the test mode (signal check), the codes are erased if normality is confirmed. The remaining codes are the codes where an abnormality was found.

(b) Procedures for test mode.

(1) Turn the ignition switch off.

(2) Connect the intelligent tester to the DLC3.

(3) Check that the steering wheel is in the straight ahead position and move the shift lever to the P position.

(4) Turn the ignition switch to the ON position.

(5) Set the intelligent tester to test mode (select "SIGNAL CHECK").

HINT: Refer to the intelligent tester operator's manual for further details.

(6) Check that the ABS warning light and VSC warning light blink (test mode).

HINT: If the ABS warning light and VSC warning light do not blink, inspect the ABS warning light circuit and/or VSC warning light circuit.